. >> the obama health care logo is [ bleep ] close to a nazi swastika logo. >> reporter: and the internet is full of references to the president as hitler or socialist or racist. >> this guy,i believe, a racist. >> reporter: to date, the secret service has disrupted at least three different assassination plots tied to white supremacist groups. so there were serious concerns this week in new hampshire when a man sood across the street with his gun on full and legal display. >> it's clearly nerve-racking when he's out in the open. i think when they do fear something could happen to him. >> reporter: and in a new report, the southern poverty loss center says since obama took office, there has been a sharp growth in the so-called militia groups, the kind that helped spawn a wave of domestic terrorism in the 1990s. ♪ [music] ♪ now they use youtube, rock music and the internet to recruit new members to spread their words of hate and fear, including this one from the supposed leader of the ohio hill lit ya. ohio militia. >> america it's your wake-up call. >> i think the president has, in eff